摘要
用回归方法确定种群数量增长率、迁移率与波动率的最优拟合曲线,求解带时变漂移串与波动串的It(?)随机微分方程,建立有迁移行为的害虫种群的数量变动模型,进而给出确定生物防治最小成本的计算方法,指出了确定模型中参数的统计方法。
A dynamic model of insects' population with migration acting was evaluated by solving Ito stochastic differential equation with t-deperident rate of increase and fluctuate, a formula to determine the minimum cost of preventing pests by using the pests' natural enemy was proposed , the statistical methods to get the optimal fitting curve for the insects' population's increasing rate, migrating rate, fluctuating rate and to determine the parameters in the model was pointed out.
出处
《数学的实践与认识》
CSCD
1999年第4期1-6,共6页
Mathematics in Practice and Theory
关键词
昆虫
生物防治
种群变动模型
时变增长率
迁移率
the quantity of insects' population, stochastic differential equation, preventing insects by using the insects' enamy, the minimum cost
